Adjustable feed wheel for grinding machines



May 11 1926. 1,584,339

H. WERNECKE ADJUSTABLE FEED WHEEL FOR GRINDING MACHINES Filed July 9,1924 .30 3/ Ms ATTORNEY;

Patented May 11, 1926.

HENRY WERNECKE, OF CANTON,

OFFICE,

OHIO, ASSIGNOR TO THE TIIVIKEN ROLLER BEARING- GOMPANY, OF CANTON, OHIO,A CORPORATION OF OHIO.

ADJUSTABLE FEED WHEEL FOR GRINDING MACHINES.

Application filed July 9, 1924. Serial No. 725,014.

This invention relates to devices for ad justing the angular position ofoscillatory shafts, such for instance as the feed-screw shaft of agrinding machine, wherein a cam actuated oscillatory feed-screw shaft isoperatively connected with a rotary grinding wheel to move the same intoand out of e11- gagement with the work. In such machines it is necessaryto adjust the angular position of the oscillatory feed-screw shaftindependently of its actuating cam so that the grinding wheel may bebroughtint-o position to engage the work regardless of the diameter ofthe work or grinding wheeL.

The principal object of the present invention is to provide independentadjustments for securing either a coarse or fine adjustment of theangular position of the oscillatory feed-screw shaft relative to itsactuating mechanism. Another object is to enable the angular position ofthe oscillatory feed-screw shaft to be adjusted a predetermined amount.Other objects are to provide for simplicity and cheapness ofconstruction and compactness of design.

The invention consists in the improved adjusting device hereinaftershown and described; and it also consists in the parts and combinationsof parts hereinafter described and claimed' In the. accompanyingdrawing, which forms part of this specification and wherein like symbolsrefer to like parts wherever they occur, 1

Fig. 1 is aside elevation of a grinding machine having a feed wheelprovided with an adjusting device embodying my invention,

Fig. 2; is an enlarged'front elevation of the feed wheel andadjustingdevice therefor, p V Fig. 3- is a vertical section on the line3-3 in Fig. 2, and j Fig.v 4 is a fragmentary vertical section on theline t4 in Fig.2,

Referring to the accompanying drawing, my invention is shown inconnection with the feed-wheel; mechanism of aroll grind ing machine A.The roll grinding machine is of a well known. construction and it isconsidered unnecessary to illustrate it in detail. The feed member orwheel 10 is journaledon the outer end of the oscillatory feed-screwshaft 11 of the machine. The inner end of the feed-screw shaft 11 is operatively connected, in any desired manner (not shown), with the rotaryreciprocating grinding wheel carriage 12 of said grind- 111g machine insuch manner as to cause its rectilinear reciprocation when said shaft isrotatably reciprocated. The carriage 12 rotatably supports a grindingwheel 12 and is reciprocated transversely of the work axis, to move saidgrinding wheel into and out of engagement with the work that is to beground. The grinding machine is also provided with a continuouslyrotating cam 13 which is operatively connected with the feed-wheel 10 bymeans of a lever cam follower 14. One end of the lever 1 1 is pivotallysecured to the feed-wheel 10, as at 15, and the other or free end ofsaid lever is pivotally supported on the upper end of a link 16 whoselower end is pivotally connected to the frame of the machine The freeend of the lever is provided with a cam roller which fits in theheart-shaped cam groove 17 in the cam, whereby rotation of the camimparts an oscillatory or rocking movement to the feed-wheel 10. Thefeedwheel 10 is provided with an outwardly projecting annular flange 18,forming. a circular recess in which located a worm wheel 19, which iskeyed or otherwise rigid ly secured to the end of the feed screw shaft11. The worm wheel is provided with a handle 19 for manually rotatingsaid wheel and the feed screw shaft 11. The front face of the worm wheelis graduated to give readings to .002 of aninch, the graduations beingadapted to be brought into register with an index mark 18 on the frontface of the feed wheel.

The upper portion of These lugs are-in alinement transversely of theaxis of the feed-wheel 10 and are provided with alined grooves adaptedto receive bearing blocks 22and 23. Thegrooves in the lugs 20 and 21 areclosed by a cover plate 23 which bridges the space between said lugs andis removably secured in place by screws.

Journaled in. the bearing blocks 22, and 23 is a worm shaft 24 having aworm 25 thereon adapted to iutermesh with the worm wheel 19. Theleft-hand bearing block 22 that supports one end of the worm shaft 2 1is pivotally secured in position within the groove or channel in thelefthand lug 20 of the feedthe feed-wheel or housing 10 is provided witha pair of outwheel 10 by means of oppositely disposed trunnion screws26, which are threaded into the opposite sides of said lug and have endportions 27 of reduced diameter that fit within circular recessesprovided therefor in the opposite sides of said bearing block and thusserve to pivotally support the same. By this arrangement, the worm 25 onthe worm shaft 24 can be swung in directions transverse to the wormwheel axis to cause the worm to engage with or disengage from the wormwheel. The free end portion of the worm shaft extends beyond the righthand bearing block 23 and is provided with a knurled knob 28, wherebysaid worm shaft may be rotated and thus impart a rotary motion to theworm in the wheel and feed-screw when the worm and worm wheel areintermeshed. Endwise movement of the worm shaft in the bearing blocks 22and is prevented by a collar 29 secured. to the pivoted end of saidshaft and by the hub portion of the knurled knob fixed to the free endof the shaft.

Located in a circular recess or pocket in the bottom of the channel inthe right-hand lug 21 of the feed-wheel 10 is a coilspring 30. Thisspring bears against the underside of the bearing block 23 thatrotatably supports the free end portion of the worm shaft in the lug 21and operates to swing the worm shaft outwardly away from the worm wheeland thus cause the worm to be disengaged from the worm wheel. The springis held in proper position during the swinging movement of the wormshaft by means of a pin 31 which depends from the underside of thebearing block 23 and projects into said spring.

The worm and worm wheel are normally held in interineshed relation bymeans of a trigger 32 that is pivotally supported in a notch 33 at thetop of one side wall of the lug 21, which supports the bearing block 23.The locking finger or detent 32 is normally held in engagement with theadjacent corner of the bearing block 23 by means of a coil spring 3adisposed crosswise of the channel in which said block is arranged. Oneend of the spring 3a is supported on the reduced inner end portion of ascrew 35, which is threaded through one side of the lug 21 and the otherend of said spring is supported on a lug or projection on the finger 32.By this arrangement, the worm on the worm shaft is normally held inengagement with the worm wheel fixed to the feed-screw shaft, and servesto secure together the feed-wheel and worm wheel, thereby forcing thefeedwheel, the worm wheel and the feed-screw shaft to rock or oscillatetogether.

The hereinbefore described adjusting device serves to accuratelyregulate and limit the depth of the cut of the grinding wheel andcompensate for the wear of said wheel by controlling the feed of thegrinding wheel towards the work. hen a coarse adj ustment is desired,the trigger is released, thereby permitting the worm to be swung out ofengagement with the worm wheel. The worm wheel feed-screw shaft may thenbe rotated independently of the feed-wheel and its actuating mechanismby means of the handle lflfiithereby causing the grinding wheel to movetowards or away from the work. After this adjustment, the worm shaft isswung towards the feed-wheel until the bearing block at the free endthereof is locked beneath the trigger. After the initial adjustment ofthe feed-wheel by means of the handle 19 a fine or more accurateadjustment may be obtained by manipulating the knurled knob 28 on theworm shaft.

The principal advantages of the above described adjusting' device isthat it permits an initial coarse adjustment to be readily made bydisengaging the worm from the worm wheel and rotating the worm wheel bymeans of the handle thereon. A fine or more accurate adjustment can thenbe'obtained by retating the worm shaft while the worm thereon is engagedwith the worm wheel. Another advantage is that the graduations on theouter face of the worm wheel permit the amount of adjustment to be notedby the operator. This feature is specially advantageous in the eventthat the work being delivered by the machine is of a size that isgreater or less than the desiredsizeor in the event that a certain knownthickness of material'is removed from the grinding wheel. In such event,the operator, by observing the graduations while manipulating thewormshaft, can shift the grinding wheel the distance necessary to obtainthe desired cut.

Obviously, the hereinbefore described ad justing device admits ofconsiderable modification without departing from the invention;therefore, I do not wish to be limited to the precise construction shownand described.

What I claim is:

1. The combination with the feed shaft of a grinding machine or thelike, of a feed member journaled on said shaft, meansfor actuating saidmember, a gear fixed to said shaft, a manually rotatable shaft journaledon said feed member and having a gear thereon intermeshing with the gearon said feed shaft, said manually rotatable shaft being arranged forswinging movement about a point adjacent to one end thereof, whereby thegear thereon is adapted to he swung into and out of engagement with thegear on said shaft.

2. The combination with the feed-screw shaft of a grinding machine orthe like of a feed wheel journaled on said shaft, said feedwheel beingprovided with an index mark,

means connected with said feed-wheel for imparting an oscillatorymovement to said feed-wheel and said feed-screw shaft, a gear fixed tosaid shaft, and a manually rotatable shaft journaled in said feed-wheeland having a gear thereon interineshing with said gear on said feedscrew shaft, said last-mentioned gear having graduations thereon adaptedto register with the index mark on said feed wheel.

3. The combination with the feed-screw shaft of a grinding machine orthe like of a feed-wheel journaled on said shaft, means connected withsaid feed-wheel for imparting an oscillatory movement to said feedwheel,a gear fixed to said shaft, a manually rotatable shaft mounted on saidfeed-wheel and having a gear thereon intermeshing with the gear on saidfeed-screw shaft, and means permitting said gear on said manuallyrotatable shaft to be disengaged from the gear on said feed-screw shaftwithout disturbing the mounting of said manually rotatable shaft. 7

4. The combination with the feed-screw shaft of a grinding machine orthe like of a feed-wheel journaled on said shaft, means connected withsaid feed-wheel for imparting an oscillatory movement to said feedwheel,a worm wheel fixed to said shaft, a Worm shaft rotatably supported onsaid feedwheel and having a worm thereon adapted to mesh with said wormwheel, means permitting the worm on said worm shaft to be engaged withand disengaged from said worm wheel, and means for automatically lockingsaid worm shaft in position with the worm thereon in engagement withsaid worm wheel.

5. A grinding machine comprising a feedscrew shaft, a feed-wheeljournaled on said shaft, means connected with said feed-wheel forimparting an oscillatory movement to said feed-wheel, a worm wheel fixedto said shaft, a shaft having a worm thereon adapted to mesh with saidworm wheel, bearing blocks for rotatably supporting portions of saidworm shaft at opposite sides of said worm, one of said bearing blocksbeing pivotally supported on said feed-wheel to permit said worm shaftto be swung towards and away from said worm wheel and the other of saidbearing blocks being slidably supported on said feed-wheel, and aspringpressed locking finger pivoted on said feedwheel and adapted toengage said slidable bearing block and thereby hold said worm shaft inposition with the worm thereon in engagement with said worm wheel.

Signed at Canton, Ohio, this 2nd day of July, 1924.

HENRY WERNECKE.

